we also have a top deputy from the fbi. an undersecretary from the state department in addition to the head of the national counterterrorism center. this is the nation's hub for threat assessments in this country. what is most eagerly anticipated is the testimony of former cia director david petraeus. what we expect now that will happen on friday, martha. martha: fast nating to see how each of those sides, and david petraeus present what was going on and what their agencies were doing. then there is this big question, catherine, which john mccain is pushing for, a special investigation, a panel, a select committee to be put in place. is there any chance of that? >> reporter: well there seems to be some immediate pushback. to lay it out for folks. we have three senior senate republicans who believe the fallout from benghazi is so significant it is on par with some of the major scandals of american history. >> watergate investigation benefited from a joint select committee. iran-contra benefited from a select committee. i thi